Apr 11, 2025
8:30am - 9:00am
Summit, Level 3, Room 328
Donghai Wang1
Southern Methodist University1
Li–S all-solid-state batteries (ASSBs) are emerging as promising candidates for next-generation energy storage systems, owing to their high theoretical energy densities, improved safety, and potential cost-effectiveness. The solid-state design eliminates the detrimental polysulfide dissolution, providing improved cycling stability compared to liquid-based systems. However, achieving high sulfur utilization in sulfur cathode under realistic conditions remains a critical challenge. This is primarily caused by the intrinsic insulating nature of sulfur, sluggish reaction kinetics, and limited ionic and electronic transport at the solid-solid triple-phase interfaces. In this talk, we will present our recent research findings and strategies developed to advance high-energy Li–S ASSBs. Specifically, we will cover our fundamental studies of sulfur conversion reaction limitation using a quantitative spectroscopic-electrochemical methodology and characterization of interfaces in sulfur cathodes through multiscale imaging techniques. Additionally, we will discuss our design of advanced solid electrolytes and cathode interface engineering approaches to promote sulfur utilization, improve overall battery performance, and pave the way for practical applications in energy storage and electric vehicles.